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Found 40 games.
O'riley's Mine


Year: 1983
 
Publisher: Datasoft
US Gold
 
Developer: --
 
Author: Mark Riley
 
Genre: Arcade
Collect'em
Single Screen
 
Controller: Joystick
Keyboard
 
Players: 2
 
Odin


Publisher: Odesta
 
Developer: Alpha-Beta Software Group
 
Author: Larry Atkin
Peter Frey
 
Genre: Board
Logical
Reversi
 
Odwracanka


Year: 1986
 
Genre: Board
Logical
Single Screen
 
Language: BASIC
 
Ogre


Year: 1986
 
Publisher: MicroProse Software
Origin Systems
 
Author: David Lubar
 
Genre: War Strategy
 
Controller: Joystick
Keyboard
 
Players: 1
 
Comment: Hi-Res mode (graphics 8).
 
Oh Frankie


Author: David Hood
 
Controller: Joystick
 
Players: 1
 
Oil Miner


Genre: Trading Strategy
 
Players: 1
 
Language: BASIC
 
Oils Well


Year: 1983
 
Publisher: Aackosoft
Main Street Publishing
Sierra Entertainment (Sierra On-Line) (On-Line Systems)
 
Developer: --
 
Author: Thomas Mitchell
 
Genre: Arcade
Collect'em
Single Screen
 
Controller: Joystick
 
Players: 1
 
Olde Gold


Year: 1990
 
Publisher: New Atari User
 
Developer: --
 
Author: Bill Halsall
 
Genre: Adventure
Arcade
Multi Screen
 
Players: 1
 
Olki


Year: 1994
 
Publisher: Stan-Bit
 
Genre: Adventure
Arcade
Multi Screen
 
Controller: Joystick
 
Players: 1
 
Ollie's Follies


Year: 1984
 
Publisher: American Eagle Software
Americana
 
Developer: Fanda
 
Author: Frank Cohen
 
Genre: Arcade
Platformer
Single Screen
 
Controller: Joystick
 
Players: 2
 
Cheat: Level codes:
Level 5: FRANK
Level 10: FANDA
Level 15: NORBI
Level 20: ZOOM
 
Trainer: Unlimited lives:
$[CE 81 36] → $[AD 81 36]
$[CE 80 36] → $[AD 80 36]
 
Olympic Dual


Genre: Arcade
Sport
 
Controller: Joystick
 
Players: 2
 
Olympic Skier


Year: 1986
 
Publisher: Americana
 
Developer: Mr. Chip Software
 
Author: Amin Hoque
 
Genre: Arcade
Sport
 
Controller: Joystick
Keyboard
 
Players: 1
 
Omega


Year: 1984
 
Publisher: SGM Software
 
Controller: Joystick
 
Omidor


Year: 1989
 
Author: Peter Sabath
 
Genre: Arcade
Qix
 
Players: 1
 
On Cue Pool 87


Genre: Billard
 
On Cue Snooker 87


Genre: Billard
 
On-Track


Year: 1985
 
Publisher: Gamestar
 
Author: Ed Ringler
John Cutter
Scott Orr
 
Genre: Arcade
Cars
Racing
 
Controller: Joystick
 
Players: 2
 
One Life


Year: 1993
 
Developer: P&S Software
 
Author: Krzysztof Paizert
 
Genre: Arcade
First Person Perspective (FPP)
Motorcycle
Racing
Simulation
 
Controller: Joystick
 
Players: 1
 
One Man and His Droid


Year: 1986
 
Publisher: Mastertronic
 
Author: Adrian Sheppard
 
Genre: Arcade
Maze
 
Controller: Joystick
 
Players: 1
 
Cheat: Level codes:
Level 2: BUBBLE
Level 3: ATARI
Level 4: FINDERS
Level 5: GENETIC
Level 6: ZAPPED
Level 7: MEGASONIC
Level 8: TIMEWARP
Level 9: ECTOPLASM
Level 10: GORGEOUS
Level 11: SEASIDE
Level 12: GIZMO
Level 13: KING KONG
Level 14: HOLOGRAM
Level 15: CURRY RICE
Level 16: COFFEE
Level 17: CASSETTE
Level 18: TELESCOPE
Level 19: COMPUTER
Level 20: EDACRAEDA
 
One-on-One


Year: 1983
 
Publisher: Ariola
Atari
Electronic Arts
 
Author: Chuck Peavey
Eric Hammond
 
Genre: Arcade
Basketball
Sport
 
Controller: Joystick
Keyboard
 
Players: 2
 
Onslaught


Year: 1982
 
Author: Harvey Lentchner
 
Genre: Arcade
Shoot'em Up
Shooting
Vertical Scrolling
 
Controller: Joystick
 
Operation Blood


Year: 1992
 
Publisher: Mirage Software
 
Developer: Our 5oft
 
Author: Paweł Bulkowski
Paweł Kalinowski
 
Genre: Arcade
Crosshair
Shoot'em Up
Shooting
 
Controller: Joystick
Mouse (Amiga)
Mouse (Atari ST)
 
Players: 1
 
Comment: Polish version.
 
Cheat: Press [OPTION]+[CONTROL]+[,] to get energy.
Press [OPTION]+[CONTROL]+[A] to change level.
 
Operation Blood


Year: 1992
 
Publisher: A New Generation (ANG Software)
 
Developer: Our 5oft
 
Author: Paweł Bulkowski
Paweł Kalinowski
 
Genre: Arcade
Crosshair
Shoot'em Up
Shooting
 
Controller: Joystick
Mouse (Amiga)
Mouse (Atari ST)
 
Players: 1
 
Comment: English version.
 
Operation Crossroads


Publisher: Shoesoft
 
Genre: Arcade
Shoot'em Up
Shooting
 
Controller: Joystick
 
Players: 1
 
Operation Desert Storm


Year: 1992
 
Author: Dariusz Żołna (De Jet)
 
Controller: Joystick
 
Players: 1
 
Operation Market Garden


Year: 1985
 
Publisher: Strategic Simulations Inc.
 
Author: Chuck Kroegel
David Landrey
 
Genre: War Strategy
 
Controller: Keyboard
 
Operation Whirlwind


Year: 1983
 
Publisher: Broderbund Software
 
Author: Roger Damon
 
Genre: War Strategy
 
Controller: Joystick
Keyboard
 
Oranges and Lemons


Year: 1983
 
Publisher: KJB Programs
 
Genre: Gambling
 
Orb


Year: 1987
 
Publisher: Page 6 Software
 
Author: Gary Wheaton (B. Wheaton)
 
Controller: Joystick
 
Orb Pinball


Publisher: New Atari User
 
Developer: --
 
Author: Chris Guise
 
Genre: Arcade
Pinball
 
Controller: Joystick
Paddles
 
Players: 2
 
Comment: Hi-Res mode (graphics 8).
Pinball Construction Set.
 
Orbit


Author: R. Horne
 
Players: 1
 
Orc Attack


Year: 1983
 
Publisher: Creative Sparks (Thorn EMI)
 
Author: Dean Lock
 
Genre: Arcade
 
Controller: Joystick
 
Players: 1
 
Osadnicy


Year: 1995
 
Author: Paweł Strzelec
 
Genre: Strategy
 
Players: 1
 
Otello


Year: 1993
 
Publisher: Tajemnice Atari
 
Developer: --
 
Author: Maciej Majchrowski
 
Genre: Board
Logical
Reversi
 
Controller: Joystick
 
Othello


Genre: Board
Logical
Reversi
 
Language: BASIC
 
Othello II


Year: 1990
 
Publisher: Sawfish Software
 
Author: Michael Guntersdorfer
 
Genre: Board
Logical
Reversi
 
Controller: Joystick
 
Players: 2
 
Language: BASIC
 
Outlaw


Year: 1979
 
Publisher: Atari Program Exchange (APX)
 
Developer: Atari
 
Author: David Crane
 
Genre: Arcade
Shoot'em Up
Shooting
 
Controller: Joystick
 
Players: 2
 
Outris


Year: 1992
 
Publisher: Domain Software
 
Author: J. Korzewski
S. Różański
 
Genre: Arcade
Logical
Tetris
 
Controller: Joystick
 
Players: 2
 
Oxygene


Year: 1988
 
Publisher: Atari Team (TAT)
 
Genre: Arcade
Mirax Force
Shoot'em Up
Shooting
 
Controller: Joystick
 
Players: 1
 
Ozzy's Orchard


Year: 1983
 
Publisher: TG Software
 
Genre: Arcade
Single Screen
 
Controller: Joystick
 
Players: 2